Machine for making barbed metal band



Dec. 1, 1959 s. E. RASMUSSEN 2,915,104

MACHINE FOR MAKING BARBED METAL BAND Filed Dec. 7, 1955 5 Sheets-Sheet 1INVENTOR.

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Dec. 1, 1959 G. E. RASMUS'SEN MACHINE FOR MAKING BARBED METAL BAND FiledDec. 7. 1955 s Sheets-Sheet. 2

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m AN IN V EN TOR. Geofgelifiasmssen MN N 1---- uqw/ @zcm Dec. 1, 1959Filed Dec. '7. 1955 G- E. RASMUSSEN MACHINE FOR MAKING BARBED METAL BAND3 Sheets-Sheet I5 INVENTOR.

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proved machine by .yvhich :shown.-in Figs. land 2 when the the machineofthe present invention; I

Fig; 4-..showsan enlarged'transverse. section through .a portion of thecompleted barbed metaltband shown-sin.

United States Patent O 12,915,104 'MACHINEFOR MAIQNG BARBEB METAL BANDGeorge E. Rasmussen,.ParkForestylllt, assiguortq Acme Steel Company,Chicago,.Ill., .a corporation of Illinois Application December7,"-195'5,= Seri'al N65551674 I 9. Claims. (Cl. .1ss-.-29

This..invention=. ;'relates to vimprovernents -i Il-=Ii1fiCh-iI1GS .formaking barbed rrnetalrzbands-imwhich. adflat metal band is. providedalong itssedges with two-.ser-ies of radiating barbs org-spikes. Thepresent inventionisparvticularlyzadapted for nse in; forming a barbed:metal band .of the type which is described and claimed in the pend- ,ingapplication. for Letters Patent of the United States,

.Serial No. 551-;684, now .P atent"No.,2,854,088,-. filed 'by Chester.M. MacCheSney and Allen .B; Wilson on Decem- .ber 7,1955. 7 w

'. In thatapplication .there isdisclosed atbarbed metal band formed froma .flat strip byslittingqthe strippinwardly from its edgesrat acuteangles :to.-its longitudinal. 1

I The principalzobject of thepresentinventionis.to. provide novelapparatus vfor operating upon ar-fiatimetal strip. to .bendedge portionsthereof transversely. tQff ol'm radiating ,barbs. ,Another. object is to.provide :an importions of. a :metal strip, formed by slitting.theledgesthereof.atacute angles,..are .bent transversely to-theplane of.the metal 'band.to assume varying angles .to. said plane,thereby-providing- -.project from-the edgespf. the strip radiating barbswhich on both sides .fof said .plane. Another objectis topro- .vide amachine comprisingtwo rotatingqrnembers each carrying a relatively.fix'ed..'die and. a .relatively..movable die adapted to operate .upon'opposite edge portions of, a metal strip tobend said portions.transve'rselyto the plane of thestrip. Still another object .Toftheinvention is-to provide a machine having two seriesof-dies adapted to bemoved successively into positionswhere theyengage the opposite edgeportions of amet'al strip and bend transversely portions "ofthe stripwhich have previously been formed by slitting the e ges of the strip;Other objects relate to various features of construction and arrangementwhich will appear more: fully hereinafter.

The nature of theinvention will be understoodlfrom the followingspecification taken with the accompanying "drawings in which" oneembodiment isillustrated. In thedrziwings;

Figure 1 showsatop plan view of" a barbed metal Fig- 2 showsanendelevation of the :barbedmetal band illustratediiir Fig. l

Fig. 3' shows a top plan:view of a flat metal'strip which has beenslitted along its edges .to form inclined pointed portions which areadaptedrtto be bent into theform strip is; passed through byt he use ofthe machine of slitted edge portions of the in Fig. 3.

- barbs alsoin'cludes two barbs 10c which I whereit is 2,915,104 iatented Dec. 1, 1959 .Fig'. 1', illustrating in elevation a portion ofthebarb embodying the present invention and adapted to produce from theslitted band shown in Fig. 3the-barbed band shownin Figs. 1 and 2;

Fig'. 7 shows a-vertical section taken on the line 7--7 .Fig.f8 shows aperspective view of a portion of the forming apparatus of the'presentinvention; illustrating theaoperation of the dies of thismachine in bending the metal strip.

Acomplete barbed-metal band'of the form adapted to be produced by thepresent invention from a slitted blank for strip is shown in Figs. 1 and2 of the accompanying drawings, and the slitted metalblankor strip isshown .This barbed metal band comprises a fiat metal :band 10 providedalong itscenter with a series of spaced index holes 1011, which areadapted" to position the band in the machine ofthe present invention bywhich it may be formed, and having along its edges twoseriesof'radiating spikes orbarbs 'which'are similarly constructed'andsimilarly located at each edge of the band: "These radiatingspikes orbarbs ateach edge of the :band includebar bs 101) which are arranged atrelatively small anglesrto the plane ofthe band and which diverge inopposite directions from that -"plane., Each series of diverge inoppositedirections-from the plane of the band 10 at sub- -stantiallygreater anglesyas shown in "Fig. 2. The barbs are spaced apartlongitudinally of the'band and each pair of barbs 10b which' aredirected in opposite directions fromrthe plane of theband are preferablylocated ad jacent ejach-=other and between two pairs of barbs whichdiverge from the plane of the band at greater angles. ,There is thusformed a flat metal band 10 having two series of divergent-spikes orbarbs located along its opposite edges and-arranged in the same mannerat each edge. Due to thedistribution of the barbs substantially aroundall parts of the band 10, this barbed metal band is well adapted forus'e'in military operations desiredto provide a barricade to prevent thepassage of troops and this construction is also well suited for-theconstruction of fences and the like where it is desired to prevent thepassage'of cattle or other animals with a minimum use of fencingmaterial.

In Fig. 3 ofthe drawings there is illustrated the flat metal strip 10dfrom which the finished product shown in Fig. 1 is formed. This fiatmetal strip is run endwise through a punch press or through suitableslitting rolls to form along the center of the strip a series of equallyspaced index holes 16a and also toslit the strip along diagonal lines'atits opposite edges to form the cuts 10e and 10); which are located atacute angles with respect to theedges of the metal strip, thus formingalong both edges ofthis strip a series 0 attached sharp portions 10gwhich are adapted to bebent from the plane of the strip .to produce thebarbed band which is shown in Figs.

1 and 2, the sharp portions 10g becoming the barbs 10b and 100 whichhave previously been described. The

, and it should be quite may be readily manipulated when it is put intouse.

The barbed metal band described above is adapted to be produced from theslitted strip shown in Fig. '3 the present; invention which 3 isillustrated in Figs. 6 to 8, inclusive. The slitted band may be formedat any desired location and then transported to the field of use wherethis may be used to form the barbed band. This band forming machinecomprises a base 12 on which are mounted two upstanding parallel framemembers 13 in which are journalled two shafts 14 and 15. These shaftsare journalled in bushings 16 mounted in the frame members and theyextend parallel to each other in horizontal planes. The shafts haveprojecting portions 14a and 15a extending beyond one of the framemembers 13 and having secured thereon two gears 17 which mesh witheachother so that the shafts rotate in unison. Although the shafts 14and 15 may be manually operated, one of them is preferably connected byapparatus (not shown) to power actuated driving mechanism so that themachine may be continuously operated when it is in use.

The shafts 14 and, 15 have enlarged central portions 14b and 15b locatedbetween the bushings 16 and journalled in surrounding cylinders or drums18, two of which are provided for each shaft. These drums are secured tothe frames 13 by studs 19, the heads of which are located in recessesformed in the inner faces of the drums as shown in Fig. 7. Each shaft isthus journalled in its own bushing 16 and also in its associated drumsor cylinders 18.

The inner faces of the two drums 18 of each shaft are spaced apart andin these spaces there are mountedtwo disks 20 and 21 which are fixedupon the shafts 14 and 15, respectively, and which are adapted to rotatein the direction indicated by the arrows 22 shown in Fig. 6. The upperdisk 20 is provided on its peripheral surface with a plurality ofradially projecting pins 20a which are adapted to engage the index holesin the metal strip when this strip is passed between the two disks inthe direction indicated by the arrow 23 in Fig. 6. The pins 20a, afterpassing through the index holes 10a are adapted to be received byrecesses 21a formed in the lower disk 21. Of course, this registrationof the pins 20a and recesses 21a with respect to the holes 10a in themetal strip occurs only when these parts are at, or in proximity to, avertical plane containing the axes of the shafts 14 and 15. By thisregistering means, the metal strip 10d being operated upon and its sharpportions 10g are located always in proper relationship to the partscarried by the disks 20 and 21 which operate upon the sharp projections10g to bend them transversely to the strip.

The upper disk 20 has fixed thereon and projecting laterally therefromin opposite directions two series of equally spaced fixed dies 20b andthe disk 20 also has pivotally mounted thereon, and on each sidethereof, an annular series of relatively movable die members 200 whichare pivotally mounted on the disk by means of pins 24 and spaced equaldistances apart. Each pivotally mounted die member 200 has a bodyportion 20d which has an inner curved surface adapted to rest normallyupon the outer cylindrical surface of one of the drums 18 and each diemember 20c also has a radially extending part 20a adapted to cooperatewith the fixed die members carried by the disk 21. In effecting thebending of the sharp edge portions 10g of the metal strip, the portions20d of the die members 20c trail behind the pivot pins 24 as the disk isrotated.

Similarly, the other disk 21 is provided with two series of relativelyfixed dies 21b which are spaced apart equal distances around theperiphery of the disk and which project laterally from both edges of thedisk for cooperation with the movable die members 20c which are mountedupon the other disk 20. The disk 21 also has mounted thereon two seriesof pivoted die members 210 which are pivoted on the disk by means ofpins 25. These die members 210 are similar to the die members 200, eachcomprising a body portion 21d having an inner curved surface adapted tocoact with the peripheral surface of a drum 18 and having also anoutwardly extending portion 21c adapted to cooperate with the stationarydie members 20b of the other disk in effecting the sharpened portions10g which have been formed along the edge of the metal strip.

In the operation of the machine, the metal strip 10d, which has beenslitted along the lines 102 and 10 is moved through the disks 20 and 21in the direction of the arrow 23 by the engagement of the pins 20:: withthe holes 10a in the strip and by the engagement therewith of the diemembers which are then operating to bend the portions 10g of the strip.Assuming that one of the sharp slitted portions 10g is approaching thead jacent parts of the disks 20 and 21, and assuming that this part 10gis in position to be engaged by a die mem her 200 on the upper side ofthe strip, as viewed in Figs. 6 and 8, the portion 20c of the pivoteddie member 20c engages the upper side of the metal strip and bends itdownwardly and outwardly against the adjacent die 21b which is carriedby the disk 21, as shown particularly in Fig. 8. The die member 21b hasa face 21), extending in a general radial direction in relation to theaxis of the disk 21, against which portion 10;; of the metal strip isbent. At the same time, the edge portion of the strip 10d at andadjacent to the base of the portion 10g coacts with an inclined surface213 of the die 21b, as shown in Fig. 8, with the result that the edge toform one of the barbs 10b or 100.

portion of the strip is bent upwardly as shown at 10k. This upwardbending of the edge portion of the strip determines the direction inwhich the part 10g extends Some of the die surfaces 21g are inclined insuch a direction that they cause the barbs to be directed in the mannerof the barbs 10b, as shown in Fig. 2, and other die surfaces 21g areinclined at another angle so as to cause other barbs to be directed inthe manner of the barbs 10c.

The inclined faces 21g of the dies 21b are shown in Figs. 4 and 5 andtheir different inclinations result in the different angles of theresulting barbs.

The end faces 21f and the'inclined faces 21g of the dies 21b arearranged differently on alternate die members and the die members 20bcarried by the disk 20 are similarly formed to cooperate with thepivoted die members 210 on the disk 21. The slits 10a and 10f in themetal strip 10d are staggered with respect to each other on oppositesides of the strip and the arrangement of the dies 20b, 20c, 21b and 210on the disk is such that the portions 103 of the strip on opposite sidesof the strip will be engaged and bent alternately in succes' sion as thestrip moves between the disks, with the result that the slitted portions10g are rapidly bent from the plane of the strip to the variouspositions which are shown in Figs. 1 and 2, thereby resulting in therapid production of a flexible barbed band capable of the uses whichhave been referred to above.

In the operation of the machine, the pivoted die memhers 20c and 210normally contact the cylindrical surfaces of the associated drums 18and, in order to prevent the parts 20e and 21a of the pivoted diemembers from catching on the relatively fixed die members 21b and 20b,-respectively,-when a pivoted die member and a fixed die member aremoving away from the zone where the bending operation takes place, thedrums 18 are provided with recesses 18a, extending through considerabledistances on both sides of the vertical plane passing through the axesof the shafts 14 and 15, so that the tail portion of a pivoted diemember 200 or 210 is permitted to move into the adjacent recess to allowthe pivoted dog to tilt so that the arm 20a and 21e thereof will pass bythe adjacent relatively fixed die 21b or 20b.

From the foregoing description it will be seen that the presentinvention provides means by which a barbed metal band may be quickly andeconomically produced from a metal strip with a minimum of attention onthe part of the .eperator and with uniformity in th ,,r esu1tingproduct.

Although one form of the "invention has-been shown and described by wayof illustration, it will. beunderstood that it may be constructed invariousother ,formslwhich dies supported. adjacentto the-pathiofmovement of the strip, and movable with the stripon 'oneside thereof,each of said dies having one face extending transversely to the plane ofthe strip and to the direction of movement of the strip and having asecond face extending at an angle to the plane of the strip, and otherdies movable with the strip and into contact therewith on the other sidethereof for bending the edge of the strip on said second named faces atthe bases of said pointed portions and for bending said portions on saidfirst named faces to form projecting barbs.

2. A machine for use in forming a barbed metal band from a fiat metalstrip having its edges slitted diagonally to form attached pointedportions, comprising means for supporting the strip during endwisemovement thereof, dies supported adjacent to the path of movement of thestrip and movable with the strip on one side thereof, each of said dieshaving one face extending transversely to the plane of the strip and tothe direction of movement of the strip and having a second faceextending at an angle to the plane of the strip, other dies movable withthe strip and into contact therewith on the other side thereof forbending the edge of the strip on said second named faces at the bases ofsaid pointed portions and for bending said portions on said first namedfaces to form projecting barbs, said second named faces on successiveones of said first mentioned dies having difi'erent angles with respectto the plane of the strip whereby the barbs are directed at differentangles with respect to said plane.

3. A machine for use in forming a barbed metal band from a flat metalstrip having its edges slitted diagonally to form attached pointedportions, comprising means for supporting the strip during endwisemovement thereof, and two series of dies supported adjacent to the pathof movement of the strip on opposite sides of each edge of the strip andmovable therewith for bending the pointed portions during the travel ofthe strip to form barbs directed at angles to the plane of the strip,each of said series comprising a plurality of relatively fixed dies anda plurality of other dies arranged alternately therewith, said otherdies of each series being adapted successively to engage the pointedportions and to bend the same on said fixed dies of the opposite series.

4. A machine for use in forming a barbed metal band from a flat metalstrip having its edges slitted diagonally to form attached pointedportions, comprising means for moving the strip endwise, and two seriesof dies supported adjacent to the path of movement of the strip onopposite sides of each edge of the strip and movable therewith forbending the pointed portions of the strip during the travel of the stripto form barbs directed at angles to the plane of the strip, each of saidseries comprising a plurality of relatively fixed dies and a pluralityof pivoted dies arranged alternately therewith, said pivoted dies beingadapted successively to engage the pointed portions of the strip and tobend the same on said fixed dies of the opposite series when urgedthereagainst, means for normally preventing pivotal movement of saidpivoted dies and for urging said pivoted dies toward said relativelyfixed dies of the opposite series, and means for permitting said pivotalmovement of a pivoted die after a bending operation has been performedthereby to clear the associated relatively fixed die.

5 A machine for use in forming a barbed metal band afrom" a flat meta lstrip having its edges slitted diagonally tofiform attached, pointedportions,fconiprising parallel shafts, means for rotating said shafts inunison, a pairiof aligning disks securedonsaidshafts a'nd'adapted tomove astrip endwise therethrough and dies mounted ,on opposite sides ofthep'eripherybf eachof said disks in angularly spacedpos itions and inoverlappingrelationship with the dies mounted on the other .disk forcooperating there- Qwithin bending-the pointed: portions .of the stripaway from the plane ofthe strip. p

6. A machine Iforuse. informing abarbed metal band :.from aflat :metalstrip having itsedges slitted diagonally to formattachedpointedportions, comprising parallel shafts,

.means. for rotating saidshafts intunison, a pair of aligning diskssecured on said shafts and adapted to engage the opposite sides of astrip and to move the strip endwise therethrough, and a series of diesmounted on each side of each of said disks, each of said seriescomprising a plurality of dies mounted in fixed position on a disk and aplurality of dies which are pivoted on that disk in alternation withsaid fixed dies, said pivoted dies on one disk being adapted uponrotation of said disks to be moved into overlapping relationship withand toward the fixed dies which are radially opposite thereto on theother disk for bending some of the pointed portions away from the planeof the strip and thereafter being pivoted away from the associated fixeddie to provide clearance therebetween.

7. A machine for use in forming a barbed metal band from a flat metalstrip having its edges slitted diagonally to form attached pointedportions, comprising parallel shafts, means for rotating said shafts inunison, a pair of aligning disks secured on said shafts and adapted toengage the opposite sides of a strip and to move the strip endwisetherethrough, and a series of dies mounted on each side of each of saiddisks, each of said series comprising a plurality of dies mounted infixed position on a 'disk and a plurality of dies which are pivoted onthat disk in alternation with said fixed dies, said pivoted dies on onedisk being adapted upon rotation of said disks tobe moved intooverlapping relationship with and toward the fixed dies which areradially opposite thereto on the other disk for bending some of saidpointed portions away from the plane of the strip and thereafter beingpivoted away from the associated fixed die to provide clearancetherebetween, said fixed dies having surfaces on which the pointedportions of the strip are deflected at different angles with respect tothe plane of the strip.

8. A machine for use in forming a barbed metal band from a fiat metalstrip having its edges slitted diagonally to form attached pointedportions, comprising parallel shafts, means for rotating said shafts inunison, a pair of aligning disks secured on said shafts and adapted toengage the opposite sides of a strip and to move the strip endwisetherethrough, and a series of dies mounted on each side of each of saiddisks, each of said series comprising a plurality of dies mounted infixed position on a disk and a plurality of dies which are pivoted onthat disk in alternation with said fixed dies, said pivoted dies one onedisk being adapted upon rotation of said disks to be moved intooverlapping relationship and toward the fixed dies which are radiallyopposite thereto on the other disk for bending some of said pointedportions away from the plane of the strip and thereafter pivoted awayfrom the associated fixed die to provide clearance therebetween, saidfixed does having surfaces on which the pointed portions are deflectedat different angles with respect to the plane of the strip and havingother surfaces on which the pointed. portions are bent by said pivoteddies into positions transverse to the plane of the strip,

9. A machine for use in forming a barbed metal band from a flat metalstrip having a longitudinally extending intermediate body portion andhaving its edge portions slit diagonally to form pointed elementsattached to the intermediate body portion of the strip, comprising apair of wheels mounted for rotation with the peripheral surface of onewheel closely spaced with respect to the peripheral surface of the otherfor progressively receiving and closelyconfining the intermediate bodyportion of the strip therebetween during endwise movement of the stripbetween said wheels, a die member fixed upon a first one of said wheelsalongside the said peripheral surface there of, said die member havingan end face thereon and having a second face extending diagonallyoutwardly radially and axially from one side of said peripheral surfaceof said first wheel, means for indexing the longitudinal movement of thestrip with respect to the rotation of said wheels so that the baseportion of one of the pointed elements will be engaged and will be bentout of the plane of the strip by said second face of said die member asthe intermediate body portion of said strip is closely confined andadvancedendwise between said peripheral sur (faces of said wheels, and asecond die member on the second one of said wheels for bending the lastmentioned pointed element across said end face of said first die memberduring the endwise movement of the strip.

References Cited in the file of this patent UNITED STATES PATENTS UNITEDSTATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 2,915,161;December 1, 1959 George E Rasmussen It is hereby certified that errorappears in the printed specification of the above numbered patentrequiring correct-ion and that the said Letters Patent should read ascorrected below.

Column 6, line 59, for "one", first occurrence, read on line 65, for"fixed does" read fixed dies Signed and sealed this 24th day of May1960.

(SEAL) Attest:

KARL AXLINE ROBERT C. WATSON Attesting Oflicer Commissioner of Patents

